Picture of Fuzz Pedal

Once you have your guitar and learned how to play in time with a metronome, the only thing left to do is rock out. However, as you might have noticed, no matter how hard you rock, it just does not sound right. That is because you are missing something. As many guitarists will tell you, the secret to rocking out is actually fuzz. Before you can do any serious rocking out, you are going to need to build a fuzz pedal. Fortunately, making your own fuzz pedal is a lot easier than it may sound.

Step 1: Go get stuff

Picture of Go get stuff
You will need:

- (x2) 2N3904 NPN Small Signal Transistor (Model: 2N3904 | Catalog #: 276-2016)
- (x2) 100K Ohm 1/4-Watt Carbon Film Resistor (Model: 271-1347 | Catalog #: 271-1347)
- (x2) 10K Ohm 1/4-Watt Carbon Film Resistor (Model: 271-1335 | Catalog #: 271-1335)
- 22 uF Electrolytic Capacitor (Model: 272-1026 | Catalog #: 272-1026)
- 0.1µF 50V Hi-Q Ceramic Disc Capacitor (Model: 272-135 | Catalog #: 272-135)
- 0.01µF 50V 20% Hi-Q Ceramic Disc Capacitor (Model: 272-131 | Catalog #: 272-131)
- 10K-Ohm Horizontal-Style Trimmer (Model: 271-282 | Catalog #: 271-282)
- 5K-Ohm Linear Taper Potentiometers (Model: 271-1714 | Catalog #: 271-1714)
- 100K-Ohm Audio-Taper Potentiometer (Model: 271-1722 | Catalog #: 271-1722)
- Multipurpose PC Board with 417 Holes (Model: 276-150 | Catalog #: 276-150)
- SPST Flatted Metal Lever Toggle Switch (Model: 275-634 | Catalog #: 275-634)
- 1/4" Mono Panel-Mount Audio Jack (Model: 274-255 | Catalog #: 274-255)
- Hexagonal Control Knob (Model: 274-407 | Catalog #: 274-407)
- Fully Insulated 9V Battery Snap Connectors (Model: 270-325 | Catalog #: 270-325)
- Enercell® Alkaline 9 Volt Battery (Model: 23-853 | Catalog #: 23-853)
- DPDT specialty stomp switch
- Sturdy metal project box


Cool thank you very much.

ikw1 month ago
Is there a different capacitor I can use instead of the 0.1 uF? I can't seem to locate one locally?
LeanneL13 months ago

Just a tip regarding the battery, you can get jack sockets with two terminal that link when the jack plug is inserted. They can be used to power the circuit only when a jack is plugged in.

I_HATE_LOSERS made it!3 months ago

this is what I got, thx for the tutorial

Iphone 11_3_14 261.JPG
stanford.todd7 months ago

This is the best I can do to understand what's what but even then I don't exactly understand how this applies to the circuit board etc.


The three lines you marked with a question mark are the ground or negative pole on the battery.

What you marked as battery leads is actually the positive port of the battery.

drewb37395 months ago
Which capacitor controls the tone?
nefcat drewb37395 months ago

I think you mean potentiometer. The 5k is for gain. The 100k is for volume.

drewb3739 nefcat5 months ago
I mean bass cutoff
Anargopunk6 months ago

hey, one question, what happens w/ the black audio jack cables??

nefcat Anargopunk5 months ago

you plug them to the ground

apawar85 months ago
Do any one did this project on breadboard??
I need your help pals !!
ranjam made it!6 months ago

If you look at the schematic, it's a Fuzz Face. Now, in a few minutes with Google you'll find a million web sites showing how to build it, mods to tailor it to your tastes, parts substitution, etc. Even some sound clips.

stanford.todd; Yes, what would have been nice is a 'lesson' on how to have every part 'line up' so you don't have a plate of spaghetti, with wires everywhere, or parts 'criss-crossing', adding RF interference. In other words, a little tip or two on laying out the parts and wiring so everything is super compact, with minimal leads. Even just a close up photo of how 'randofo' made his build line up on the perfboard. My own build has RF interference, but apparently many commercial Fuzz Faces had the same problem. Of course there mods to try and eliminate this.

Still a fun build. Mine has NO perfboard; all the parts are just 'flying' in mid air, soldered and tacked together, with the leads cut as short as possible. Still works like a charm after a few mods.

stanford.todd7 months ago
Who can give a better explanation of how to make the circuit. I'm so confused.
Wait, the video shows it being played and there is virtually no fuzz?????
EricS311 months ago

Could I please see how to actually MAKE the circuit? It's not "nice" to show everything except what we actually need to know. Totally useless demo. Really. I went out and bought the components--this list being very helpful,thanks--only to find the instructions part TOTALLY USELESS. Are you working for Radio Shack? IF so, I will never go there again.(Radio Shack, if you're reading, don't let this as#&*(%le represent you)

ClarkM1 EricS311 months ago

I agree, everything is great but a vid on building the circuit would be great.

ClarkM111 months ago

Your schematic isn't drawn correctly. You should have dots on the connections which makes it slightly confusing to build. But nice instructable!

kaleb.mayhew.711 months ago

how much wiring do you need and what type

pedrovai1 year ago
Could you post the straight fuzz circuit path. I want to build a simpler circuit with fixed volume and gain?, absolute beginner soldering here.
Ok, the model numbers provided and description of the components are not what you receive if you go into a radio shack OR order from radio shack online for the following components:

0.1µF 50V Hi-Q Ceramic Disc Capacitor (Model: 272-135 | Catalog #: 272-135)1/4" Mono Panel-Mount Audio Jack (Model: 274-255 | Catalog #: 274-255)

for some reason no matter what you do, you will receive Model Numbers 272-0135 and 272-0255.

You will receive a 500WV Hi-K Dielectric Capacitor and a Stereo Phone Jack instead of the components in the schematic and in the "go get stuff" list. I have tried to get the correct parts through radio shack for over a month now.

And I agree with Antonye, there aren't very clear instructions provided with how to put this thing together, especially for a beginner. An instructable should do just that, instruct. There is nothing mentioned about wiring in the components or what guage wiring to get. Board placement would also be helpful for someone with no experience and this is the first project they want to build.
Antonye2 years ago
Very unclear instructions to follow if you aren't more advanced in electronics. Are the PDF instructions more step by step for what connects where and is soldered in connection to what? Looks great, my boy went out and bought all of the components and now he is asking me to help him put it together. Building the circuit board as per the schematic is ok if you can read that ok, but I can't. I realise my boy should have researched this more before he bought all of the components, but I think he believed there would be more step by step instructions. Can anyone help please as he is really keen to build this, has spent all of the money and now we are unclear of how to put the circuitry together without more clear step by step component connection instructions.
Do you have a model # for the 0.01µF 50V 20% Hi-Q Ceramic Disc Capacitor. I was able to find a 500V that matches the model # listed in the above "you will need" section. I have model #272-0131, is this the correct capacitor?
marshy6642 years ago
my project is putting out a lot of buzz when i turn on my amp. Is this supposed to happen? P.S this is the first pedal i've built.

randofo (author)  marshy6642 years ago
Yes and/or no. It depends what type of "buzz."

Does it do this with the clean signal? If so, then you have a problem.

Try adjusting the knobs and trim pots. Does that get you a more pleasing sound?
kimjames2292 years ago
Would it be okay to use a breadboard so that I could avoid soldering as much as possible, as I am a beginner in electronics..?
randofo (author)  kimjames2292 years ago
Yes. You run the risk of components or wires falling out and maybe there being a little static, but otherwise I see no reason why you could not.
poplar tree2 years ago
hi all. i've begun to build the fuzz! but alas i have hit a brick wall already. this is my first project besides a theremin kit. i don't know much about electronics. i was wondering if someone would post some good picks of their finished project, as pics are about all i'm going on. learning to read schematics as i go, so hopefully something will click during the process. cheers!
brocowski2 years ago
oh and the dimensions for the box are 120 x 95 x 35mm i believe
brocowski2 years ago
hey if your trying to find the project enclosure he uses and the stomp switch he uses you can order bother from sparkfun.com. just go their website and type in the seach box "stomp" and hit enter and you see two metal project enclosures and the stomp switch
Mr.Pockets2 years ago
what are the dimensions on the box?
tykal1232 years ago
Hey sick pedal! I want to make one myself but I was just wondering, if I use a 33uF 16V capacitor does it matter?
Thanks nice info really informative.
pemc2 years ago
hey i'm from ecuador and the only foot switches i can find are similar to these http://www.radioshackecuador.com.ec/index.php/electronica-circuitos/componentes-electronicos/switches/miniinterruptor-moment-neo-spdt-con-bot-n-pulsador-3-a-detail
i don't know if it would work since they look like plastic.
Also, how can i make this effect sound dirtier?
Awesome instructable!!
I'm very interested in creating my own guitar pedal.
Thanks a lot for posting this in such great detail!
I built this pedal
I used a different set of transistors from an old broken Oscilloscope
but the sound keeps cutting off, like the fuzz will blast like it should but it cuts out after about 2 seconds and comes back on and cuts out again
and every high gain transistor set (even the ones recommended here) that I have used does the same thing
any ideas as to what can be the problem here?
randofo (author)  THELAZERVIKING!2 years ago
Yeah. Probably the transistors you decided to use.
pemc2 years ago
would this work with 1/2-watt resistors?
randofo (author)  pemc2 years ago
It should
Tim772 years ago
Thanks for the reply, sorry for replying late. I have another question. My potentiometers legs are about 3 inches long (they look exactly like the one in the link and they dont look like the ones in the video) so im wondering if I can cut them shorter? Is that possible? If so how? What do you recommend I do?
Thanks so much. :)

P.S. I've put a picture of how the one i have looks like here.
Photo on 2013-01-27 at 20.19.jpg
randofo (author)  Tim772 years ago
Yeah. With a Dremel or hacksaw. Be careful.
666sebas9992 years ago
Something wrong happened, It didn't work and I tried to figure out what happened; I found this, even with the effect on bypass the signal isn't going through; when I unplug the DC power, signal goes through bypassed-effect. This have never happened to me before, can someone explain me what just happened?
Thanks :D
Tim772 years ago
Hey, the picture of the toggle switch in the link looks different than the one in the video? If it was a typo, could you please link me the correct one? Thanks :)
randofo (author)  Tim772 years ago
The linked one is fine. I just used the DPDT switch because I had it on hand. The SPST switch will do the job. You only need two terminals.
Thanks for this great instructable. I'm new to electronics and really excited about building this fuzz.

One question, why do you use a 0,01 µF 500V capacitor if you're working with a 9V battery? Wouldn't 50V be enough? I'm asking because I couldn't find any 500V capacitors in my local electronics store
randofo (author)  mayihavecookie2 years ago
That should read 50. Thanks for pointing that out. Will correct.
hey randofo are there any other tansistors that can be usd instead of 2n3904?
randofo (author)  MadGuitarist2 years ago
Yes. Just about any other general purpose NPN transistor will work and create a slightly different sound. Check out this project for some ideas:

Just be aware of the transistor pint-outs.
enoguera12 years ago
which measures have the box?
warehouse322 years ago
what would be the effect on the pedal if the 10k trim pot were adjusted from its original position?
I couldn't really get it to work. My trimmer and 5K pot seem to do absolutely nothing and volume is pretty low. You don't have any suggestions on at least getting the levels up, do you? I'm not studied in electronics at all.
randofo (author)  VaughnTheSheep2 years ago
Are you sure you have the right transistors and they are wired correctly. Look at the datasheet and examine the pin-out diagram. The schematic does not show which pin is which, only how they should be wired in relation to other parts. Also, double-check all of your connections. Make sure each part is connected to the appropriate amount of other parts. And resistor values is another thing you could double-check.
Alright thanks, I'll mess around with the soldering iron later. Seems like the signal strength is quiet unless i hammer on the strings but then it comes out loud and crunchy. Pretty satisfactory for first project. Thanks again.
This is so inconsistant, firstly the schematic says the second and third terminals on the pot are connected together. Secondly, the first page says it's a 5K ohm, not a 10k
randofo (author)  VaughnTheSheep2 years ago
The 2nd and 3rd can be wired together if you want them to be. It is not necessary.

A 10k trim is fine. Just replace the 5K trim pot and tune was you would the 5K. The extra resolution won't hurt.
randofo (author)  randofo2 years ago
Okay. I see. The potentiometer should be 5K. Yes. That was a typo.
Alright thank you. In the middle of soldering, first electronic project I've taken on and the frustration and anxiety is piling on. Thanks a lot for the instructable though I'm really interested to do more of these if I can successfully complete this one.
freeza362 years ago
Did you ad an AC converter?
Also where do the ends of the diagonal 100 kohm resistor go?
randofo (author)  SGThartman5672 years ago
Not sure which one you mean.
Can you just post a picture looking straight down at the pc board
randofo (author)  SGThartman5672 years ago
You are probably referring to the 100K resistor going between the power supply and the transistor
Yes one more thing what on the schematic represents the trimmer?
Great project!
You mention an attached template for the cork and rubber guards. I didn't find it attached - do you have it?

Is the capacitor on the left the 0.1uf or the 0.01uf?
What hole on the board is the red wire from the 5 k pot going to?
randofo (author)  SGThartman5672 years ago
It is going to the emitter of the 2N3904 transistor
Hi can I use 1/2 watt resistors for the 100k ohm ones?
randofo (author)  SGThartman5672 years ago
Should work
Davvik3 years ago
Anyone know if it is possible to run this circuit at 12 volts without having to upgrade the resistors to a higher wattage?
You shouldn't need to change anything. A 12volt supply might clean the pedal up a bit-- at any rate it will sound different.

Also: watt=volt/resistance
[or: I=V/R]

None of these resisters would get a full 12v across them, as they would need to be tied from ground to the positive supply, and then why would the electrons bother with going through the transistors and amplifying our signal? The 100k resistor on the collector of the first transistor might get the closest.
So: I=12v/100,000R
[100k means 100,000R]
thus: I=0.00012
So at most there could be little more then 1/10000 of a watt across it.

StanvanBeek2 years ago
What is the size of the box you've used?
omersiar3 years ago
jrs0303 years ago
can someone please tell me how this should sound. I think i have it done. But its fuzzy, just not real fuzzy. and my fuzz knob doesnt seem to be controlling the fuzz. Any help would be appreciated. Thank you.
eamlie3 years ago
Ok. I have it working but, it sounds like the clean tone is mixing with the fuzz tone, overpowering it. It sounds like two signals in one rather than just my distorted guitar. Has anyone else experienced this?
eamlie3 years ago
I've built the circuit correctly and the volume goes up and down with the 5K but, the 100K pot does not produce the fuzz fully. I get it very, very slightly. The foot switch is working correctly as well. Any advice?
randofo (author)  eamlie3 years ago
The 5K is gain and should be making the fuzz. The 100K is volume. If it is not working quite right, try checking your connections or the tuning of the 10K trim pot.
eamlie eamlie3 years ago
Is it possible to eliminate the 100K pot?
EJMcGill243 years ago
What are the dimensions of the Project Box you used? Also, should there be any worry about the circuit board coming into contact with a metal project box?
randofo (author)  EJMcGill243 years ago
I use this size.

Definitely put something between the circuit and enclosure. It will short out.
Heitz3 years ago
This was a great instructable. The fuzz requires a little volume to get a fuzzy punch but I really enjoyed making it. Just have to add some knobs and call it quits. Thanks!
thechiliman3 years ago
I would like to make it with LED diode. Where should i put it? Thanks
randofo (author)  thechiliman3 years ago
The foot switch is not currently wired to deal with an extra LED. Would you just want it to indicate whether or not the switch was pressed or whether or not the pedal was on?
Yes, just to see if pedal is on...
randofo (author)  thechiliman3 years ago
You need to wire the LED and a resistor (try 330 ohm perhaps - or 1k ohm to be on the safe side) between power and ground. When the circuit is turned on, the LED will glow.
geoslim133 years ago
I think I will make one for my younger sisters electric cello.
Electric cello. Nice.
I have a pick up for my cello. would this or something similar work on it?
Yea it should. Any effects pedal would, as long as you have a 1/4" cable that you use.
I do. Thanks.
kerryavance3 years ago
Hey I just built this circuit but it's not working for me. When I turn it on it just makes my guitar quieter but no fuzz. Any idea where I may have gone wrong?
It might be possible that one of the capacitors is not wired properly. I haven't built this circuit, but ive built numerous other ones. I say the capacitor because on the Wah circuits, if you lift one of the legs of a capacitor, it cancels the Wah and makes a volume circuit.
Ecirpddot3 years ago
So I've followed your schematic and when I turn the circuit on and get nothing. I've trouble shot the circuit numerous times and still get nothing. What should I do
Troubleshoot again! haha but check that there are no bridged solder connections, faulty solders, make sure your grounds are all connected, check with a multi-meter that the circuit is getting power, check google :D
dgeorgaras3 years ago
First thing i've got to say is...GREAT FUZZ
I started of by laying all the components on a test breadboard
when I first plug it in to my guitar, the by-pass signal made a buzzing sound
but when I engaged the DPDT switch... it was such a smooth fuzz
Also the volume pot is doing nothing, just not functioning, yet the fuzz pot is
If you have any suggestions on how to fix the bugs, please respond
Check the wiring on the volume pot, which lugs are connected where. Also check that the pot is wired to the correct spots on the circuit board.
weezhum3 years ago
The Potentiometers i bought, (used part number) the stems on them are reallly long, they dont look like the photo you have. But if you click on the link you provide it shows the ones i got. Any thoughts?
A potentiometer is a potentiometer. Their designs vary, but as long as you get one with the same values, it should be aight. I had a pot with a stem about 3 inches long from Radio Shack and I cut 2 inches of it off for my wah
mrmerino3 years ago
I have no idea why I'm suddenly conceded with this now, but where the circuit up there says ground, is wis necessary to connect the grounds from the input and output jacks?
randofo (author)  mrmerino3 years ago
YNOT3333 years ago
Did any make a board layout for this? Or a easy way to figure out layout?
randofo (author)  YNOT3333 years ago
freeza363 years ago
if only I knew SOMETHING about electronics
randofo (author)  freeza363 years ago
rockdrum3 years ago
What are the dimensions of your project box?
LoneStarWD3 years ago
Santa vaca! This is incredible!
hazzywazzy3 years ago
does it have to be a metal project box can i use a plastic one??
randofo (author)  hazzywazzy3 years ago
Plastic is okay. It is just more likely to break when you step on it.
jtucci3 years ago
Why the hell don't pedal companies do this?
Garlikguy3 years ago
Finished this project yesterday, and I want to thank you so much. It was my first real electronics project besides a hovercraft I made from some Styrofoam, wires, and motors. It is a very satisfying project to complete, and it works great. (only thing is, make the connections and components more spaced out, otherwise you can run into some problems with solder on the bottom touching each other.)
pfred23 years ago
I've built a 2 transistor fuzz its OK. I still want to build one using vintage Germanium transistors to see if it is any nastier. Now if you really want to rock out build the circuit at the bottom of this page:


I built one and took it to a music store and let the guy that owned it play around with it some. While he was using it he looked like he was in a trance and when he got done all he could say to me was how much do you want for it? The guy was stupefied.

It is beyond awesome! I have a vintage JRC4558 in mine so that may help some I don't know. I think I ran it with some other ugly 4558s and it sounded just about as good to me. Those old JRCs are a little richer than everything else though.

I'll have to post an Instructable about how I built mine. I have the Eagle files still and loads of construction pictures for it. It should be as epic as the device is. I have one question though how do I put up Eagle sch and brd files so they don't get messed up?

I think with the overdrive pedal it really does need to be etched.
this is awesome! i am about to make my own guitar, so it is really cool learning how to make all of my gear. what are the dimensions of the box? and where did you get the stomp switch?
randofo (author)  zen of zappa3 years ago
I got the switch and case from Small Bear Electronics:
could anyone please post a modified schematic for taking out the switch and turning on the pedal with the input jack?
randofo (author)  egallagher-doucette3 years ago
Get a stereo jack and wire ground from the battery to the middle stereo contact and the ground wire from the circuit to the ground (barrel) contact. When you stick in a mono plug it will bridge the middle battery contact and circuit ground contact to complete the circuit.
Hey that was pretty easy to build I even designed a custom PCB layout, if anyone is interesed... I will upload the pictures! :) I only have a problem... the fuz sound like synthesizer maybe the problem is because I used a 500K trimpot instead a 10K maybe someone of you can help me :)
randofo (author)  scórdova plata3 years ago
That would do it. The trimpot is for very fine tuning.
How possible would it be to add more modifiers from a real fuzz factory pedal like stability, drive, compression, gate?
randofo (author)  Halt! I am Reptar4 years ago
Ziggy9314 years ago
Will this work for a bass?
Just was about to ask the same thing. I would think so, but Id try it at a low level first. Id just like to know for sure before i make one.
djfrizz4 years ago
I am having trouble with the pics of the circuit, although it is close up - just seeing acutally where the wires go on the board. Did you get the circuit from another source and/or is it a clone of a well known circuit? Nice job. Good explanation and step-by-step that a lot of newbies need.
luke07094 years ago
It works! I still have to fine tune it, but it's a nice fuzz! Thank you Randy!

I built this using perfboard instead of stripboard with little knowledge of electronics. I don't know what the trimpot does¿? I hope these images help (se attached).
Gryt luke07094 years ago
Thanks so much, that helps a lot!
Arcagelinos4 years ago
I haven't seen where to connect the black wires from the audio jacks. Just leave it hanging? connect together? I'll go with connect together for continuation when the fuzz box isnt working.
Black wires are all ground (GND), so connect them all together (black wires from jacks, pots and circuit) to have a common ground.
Gryt4 years ago
I second this, is there anyone who can explain how to put the circuit together, I have absolutely no understanding of what the schematics mean unfortunately.
ckgarside4 years ago
Could someone PLEASE post a top-down photo of the assembled circuit. Im new to schematics and have a bit of difficulty understanding them fully. Thanks.
bitza20094 years ago
I don't know man...at some point is making a high pitch sound....and then make's a sound like a swish....tell me what's wrong here...please send me an e-mai at bitza2009@yahoo.com with all the wright stuff...and some advices...Thanks, and I'm waiting for some answers/\
bitza20094 years ago
my fuzz pedal doesn't work...I've made this project 3 times and still nothing....
thewizard424 years ago
You can completely bypass using a power switch with a stereo 1/4in jack for the input, using the part the jack for the ring to open and close a connection to ground when you plug in the cable.
But if you connected an array of guitar pedals, this would be unsuitable.
True. Moving the input and output jacks to the rear of the box and fitting a socket for external power would help. The Volume control could be removed too, no one ever adjusts that while they are playing - it gets set to max the first time you use it and never gets touched again, just a preset set to "line-out" levels would be fine.

Personally I'd replace the DPDT stomp switch with something a little lighter, those things hurt your feet when you've thin soled shoes on.
Why would you wear thin-soled shoes for playing the guitar or bass when you can wear shoes that survive the jump off the stage (couch)?
The jack isn't for external power though, although one would be preferable. And when I'm playing bass, I switch all of my settings around mid song with my feet, so leaving in volume controls is a must for me haha.
How so? Nearly EVERY pedal on the market uses a stereo switch on the input to connect and cut power to the whole circuit. Been building boutique pedals for years.
Look the the input jack in that picture, and try to see exactly what I'm talking about.
But your original comment didn't suggest that you still had a stomp box switch. I thought that you completely removed it but you are correct, every pedal on the market does use a stereo input jack for a master power switch
SirWhy4 years ago
First, Great instructable, definitely building this one.

Second, Will this work well with a bass guitar, as I would like to use it with mine.

I also would like to know if it would be good for bass cause i'd rather make a fuzz for cheap rather then buy one for much more
quesocryer4 years ago
This sounds awesome! I really wanna try this. Has anybody tried it on a bass guitar? If so, what do you think?
KJ4ZVQ4 years ago
anyone else who is interested: i was tinkering (as usual) with aproject useing an lm386 audioamp, and came up , instaed of a mini guitar amp, a nice overdriver efect. instead of a speaker, i used another mono jack, and muted it by runing a 10k ohm resistor between the output leads. just a thought, and great i'ble, which is now under construction on the workbench:0
jakdedert4 years ago
Nice, simple circuit...but what does it do? I know what fuzz is, of course, but how does it sound; or do I have to build it to find out? Also, can you detail the functions of each pot in the circuit?

I don't see anything in the video or instructions about the actual operation of the unit.
Great question, was wondering that myself. Here's a little bit more of an answer for you:


I put this sim together to see what the "fuzz" in this pedal was really doing to distort the signal.

Have got parts on order. Will update the page when I get a scope on the output.

randofo (author)  jakdedert4 years ago
One on the left is gain and the one on the right is volume. The trim pot inside is for fine tuning.

I'll post a video soon.
thewmas4 years ago
I've taken an old 9v battery and used it for the snap connector, saves about $3 and found this site for cheap parts, but with a $25 minimum
I really like that you chose a cast metal box and heavy stomp switch. FX boxes take a lot of abuse, so that's a great idea.

Some things I would do if I were building this circuit:

Heat-shrink. I'd put heat shrink sleeves on every terminal of the pots, switches and jacks. Nothing worse than something shorting out during your solo...

Mount the circuit board. I'd add some small screws and mount that circuit to the back panel over the insulation, just to make it more bulletproof. Flat head screws would make a nice finishing touch.

Battery indicator. I'd add a LED and current limiting resistor to the power switch and drill one more hole for the LED. No more dead batteries because you forgot to turn it off. I'd also use a clip to mount the battery inside the box. I don't like stuff rattling around inside.

Nice basic project. With a little care, it looks as good as a store-bought unit. The steps used in this can be adapted to any effects box project.
BusyHands4 years ago
Nicely done instructable. An audio project could really use a sound example or a video demonstrating how the box works, though!
andreq4 years ago
I've done something similar some years ago, cloning a DOD 250 overdrive pedal.

Here's a website with a lot of information about Effect Pedal and other guitar related gadget for DIYer.


The nice thing is that most of the projects are fully open source and contain a PCB transfer layout ready to go.
denry124 years ago
Very nice instructable.
I just wanted to complain about the on/off switch. Probably a matter of taste, but factory made pedals (and mine :D) use stereo input jack for power switching. If mono jack is connected to input, pedal is powered up.

Just thought that maybe I could educate someone ;)
is there a way to make the stomp switch both the switch for power and fuzz?
vishalapr4 years ago
How do you take such beautiful pictures!My pictures background is always messed up!Please tell me how do you get such awsome pics!
randofo (author)  vishalapr4 years ago
That helped a lot !Thanks!!!
just put what ever you are going to take a picture of on a big piece of white paper or posterboard. It works great :)
Ah! Ok! Ill try that from next time!
Schmidtn4 years ago
Another nice write up. Is there a video of what the pedal sounds like? Fuzz comes in a lot of flavors. Also, have you tried replacing your DPDT stomp switch with a 3PDT foot switch so you can add an LED on/off indicator? Those come in super handy and aren't too hard to wire up. Looks like a great write up, just wish I knew what it'll sound like before I build it.
Matt Carl4 years ago
Where did you find the metal project box? i
randofo (author)  Matt Carl4 years ago